Method1. Sieve the flour, baking powder, cocoa powder and salt2. Dissolve the soda in milk3. In a vessel cream the butter and sugar till light and fluffy. In another vessel beat the eggs well.4. Then add the eggs to the creamed butter mixture. Beat a little more.5. Add essence. Fold in the sieved flour. Add milk to make a soft consistency.6. Put in a greased and lined tin and bake at 200 o C/ 400 o F for 20-25 minutes or till done